You will be just fine, as in all our classes there will be some with more experience, some with less. I certainly will be relying on others to carry my butt in histology! To be honest I am not sure how helpful reading it out of a book will be, and also most gross anatomy classes I know of are based on the dissection of the dog, with maybe a special prep or two on the different species (horse, ox). I'd say start by getting a copy of Evans' Dissection of the Dog. (BTW either buy the smaller Evans guide, or the full Miller's Anatomy of the Dog -- they are the same book, the Evans guide is just the condensed version centered on the actual dissection w/o the physiology). Dyce is a good all around physiology text, not so much a dissection manual. I actually do not know the other two books listed as reccomended. As to the ox, do you know your four chambers of the ruminant stomach, the pillars and grooves, and the spiral loop? If you know that you are pretty much golden as to different internal anatomy. Everything else is pretty much the same species to species, except a muscle here, a nerve there.